EP 0273509 A1 19880706 - Process- and apparatus for recovering a pure substance from a liquid mixture by crystallization.
Title (en)
Process- and apparatus for recovering a pure substance from a liquid mixture by crystallization.
Title (de)
Verfahren und Vorrichtung zur Zurückgewinnung reiner Bestandteile aus einer Lösung beim Kristallisieren.
Title (fr)
Procédé et appareil pour récupérer une substance pure à partir d'un liquide par cristallisation.
Publication
Application
Priority
NL 8603314 A 19861229
Abstract (en)
The invention relates to a crystallization process for recovering a pure substance from a liquid mixture, a starting mixture being cooled down in a crystallisation zone to form a crystal suspension from which crystals of the pure substance are recovered, wherein a) the crystal suspension is subjected to a crude preliminary separation in a (preliminary) separation zone to form a first mother liquor and a crystal mass containing relatively small particles, b) the crystal mass formed in a) is allowed to develop in a development zone at a temperature which is higher than that of the crystallisation zone and lower than the melting point of the substance to be recovered, and is separated into a developed crystal mass and a second mother liquor, and c) the developed crystal mass formed in b) is separated into a third mother liquor and the intended pure substance in a separation zone, as well as to an apparatus suitable for performing said process.
IPC 1-7
IPC 8 full level
A23L 2/12 (2006.01); B01D 9/00 (2006.01); B01D 9/02 (2006.01); C07C 1/00 (2006.01); C07C 7/14 (2006.01); C07C 15/08 (2006.01); C07C 67/00 (2006.01)
CPC (source: EP KR US)
B01D 9/0004 (2013.01 - EP US); B01D 9/0036 (2013.01 - EP US); B01D 9/004 (2013.01 - EP US); B01D 9/0045 (2013.01 - EP US); B01D 9/005 (2013.01 - EP US); B01D 9/02 (2013.01 - KR)
Citation (search report)
- [X] US 4004886 A 19770125 - THIJSSEN HENRICUS A C, et al
- [A] FR 1132585 A 19570313 - PHILLIPS PETROLEUM CO
- [A] US 4557741 A 19851210 - VAN PELT WILHELMUS H J M [NL]
- [A] US 3557226 A 19710119 - SHERK FRED T
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0273509 A1 19880706; EP 0273509 B1 19920304; DE 3777126 D1 19920409; ES 2030423 T3 19921101; JP S63185402 A 19880801; KR 880007105 A 19880826; NL 8603314 A 19880718; NO 875446 D0 19871228; NO 875446 L 19880630; US 5062862 A 19911105
DOCDB simple family (application)
EP 87202508 A 19871214; DE 3777126 T 19871214; ES 87202508 T 19871214; JP 32845087 A 19871226; KR 870014480 A 19871218; NL 8603314 A 19861229; NO 875446 A 19871228; US 40298989 A 19890905